[Amendment10]

So which is greener, the John Deere tractor or the steam tractor? At only 18 hp, I suspect the more powerful steam tractor is greener.

[DManA]

Unfiltered coal smoke is nasty stuff.

[tbpiper]

So which is greener, the John Deere tractor or the steam tractor?

Well, duh. The John Deere. They all come painted that way.